Distressing with Coffee

On this punched piece I decided I wanted to antique the colors a bit. First I wetted it then I submerged it into a bowl of warm coffee. I had just added a couple heaping teaspoons of instant coffee to some hot water. I let it soak for 5 minutes but not much happened so I went for 15 more . I squeezed the liquid out and now am letting it dry on a towel.